οὐκ ἔστι γῆρας τοῦδε τοῦ μιάσματος → that pollution never wears out, that pollution can never grow old
P. αὐστηρότης, ἡ.
of temper: P. and V. πικρότης, ἡ. Ar. and P. δυσκολία, ἡ, P. αὐστηρότης, ἡ; see anger.